MESON Chess Problem Database
Problem Display
PID: 204316 (4Q3/2p5/2N3P1/5krb/1p2N1p1/1n3qB1/1P1p2P1/1K1R1R2 w - - 0 1)
Duras, Oldrich
Shakhmatny Listok, 1925
#2
10 + 9
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qxf1
- 2.Rxf1#
- 1...Qf2
- 2.Rxf2#
- 1...Qf4
- 2.Rxf4#
- 1...Rxg6
- 2.Qe5#
- 1...Bxg6
- 2.Qe5#
- 1...Sa1
- 2.Sd4#
- 1...Sc1
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa5
- 2.Sd4#
- 1...Sc5
- 2.Sd4#
- 1...Qxf1
- Tries
- 1.Ka2?
- 1...Qxf1
- 2.Rxf1#
- 1...Rxg6
- 2.Qe5#
- 1...Bxg6
- 2.Qe5#
- 1...Qf2
- 2.Rxf2#
- 1...Qf4
- 2.Rxf4#
- 1...Sa1
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa5
- 2.Sd4#
- 1...Sc5
- 2.Sd4#
- 1...Sc1+!
- 1...Qxf1
- 1.Kc2?
- 1...Sd4+
- 2.Sxd4#
- 1...Qxf1
- 2.Rxf1#
- 1...Rxg6
- 2.Qe5#
- 1...Bxg6
- 2.Qe5#
- 1...Qf2
- 2.Rxf2#
- 1...Qf4
- 2.Rxf4#
- 1...Sc1
- 2.Sd4#
- 1...Sa5
- 2.Sd4#
- 1...Sc5
- 2.Sd4#
- 1...Sa1+!
- 1...Sd4+
- 1.Sxd2?
- threat
- 2.Qf7#
- 1...Kf6
- 2.Qf7#
- 1...Rxg6
- 2.Qe5#
- 1...Bxg6
- 2.Qe5#
- 1...Sxd2+!
- threat
- 1.Sc3?
- threat
- 2.Qf7#
- 1...Kf6
- 2.Qf7#
- 1...Rxg6
- 2.Qe5#
- 1...Bxg6
- 2.Qe5#
- 1...bxc3!
- threat
- 1.Sc5?
- threat
- 2.Qf7#
- 2.Qe6#
- 1...Kf6
- 2.Qf7#
- 1...Rxg6
- 2.Qe5#
- 1...Bxg6
- 2.Qe5#
- 2.Qe6#
- 1...Sd4
- 2.Qf7#
- 1...Sxc5!
- threat
- 1.Sd6+?
- 1...Kf6
- 2.Qf7#
- 1...cxd6!
- 1...Kf6
- 1.Bh2?
- 1...Qxf1
- 2.Rxf1#
- 1...Rxg6
- 2.Qe5#
- 1...Bxg6
- 2.Qe5#
- 1...Sa1
- 2.Sd4#
- 1...Qf2
- 2.Rxf2#
- 1...Qf4
- 2.Rxf4#
- 1...Sc1
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa5
- 2.Sd4#
- 1...Sc5
- 2.Sd4#
- 1...g3!
- 1...Qxf1
- 1.Bxc7?
- 1...Qxf1
- 2.Rxf1#
- 1...Rxg6
- 2.Qe5#
- 1...Bxg6
- 2.Qe5#
- 1...Sa1
- 2.Sd4#
- 1...Qf2
- 2.Rxf2#
- 1...Qf4
- 2.Rxf4#
- 1...Sc1
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa5
- 2.Sd4#
- 1...Sc5
- 2.Sd4#
- 1...g3!
- 1...Qxf1
- 1.Rf2?
- 1...Rxg6
- 2.Qe5#
- 1...Bxg6
- 2.Qe5#
- 1...Sa1
- 2.Sd4#
- 1...Qf4
- 2.Rxf4#
- 1...Sc1
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa5
- 2.Sd4#
- 1...Sc5
- 2.Sd4#
- 1...Qxf2!
- 1...Rxg6
- 1.gxf3?
- threat
- 2.Qf7#
- 1...Rxg6
- 2.Qe5#
- 1...Bxg6
- 2.Qd7#
- 2.Qe5#
- 2.Qc8#
- 1...gxf3!
- threat
- 1.Ka2?
- Keys
- 1.Sf2!
- threat
- 2.Qf7#
- 1...Qxd1+
- 2.Sxd1#
- 1...Qe4+
- 2.Sxe4#
- 1...Qd3+
- 2.Sxd3#
- 1...Kf6
- 2.Qf7#
- 1...Qxc6
- 2.Se4#
- 1...Qxf2
- 2.Rxf2#
- 1...Rxg6
- 2.Qe5#
- 1...Bxg6
- 2.Qe5#
- 1...Qd5
- 2.Se4#
- 1...Qc3
- 2.Sd3#
- threat
- 1.Sf2!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 7
- Sets
- Q(c);N_SPINQ(c),OGATE,P_PINR(B),XR(C)::R(B),XQ(c)
- Q(c);OGATEB::R(C),XQ(c)
- Q(c);OGATE::R1(C),XQ(c)
- R(g);SBLOCK,XP(I)::QAR1(J)
- B(h);SBLOCK,XP(I)::QAR1(J)
- S(b);N_GUARD::S(H)
- S(b);N_GUARD::S(H),XS(b)
- Tries
- Try
- K(A);S_FLIGHT
- Vars
- Q(c);N_SPINQ(c),OGATE,XR(C)::R(B),XQ(c)
- R(g);SBLOCK,XP(I)::QAR1(J)
- B(h);SBLOCK,XP(I)::QAR1(J)
- Q(c);OGATEB::R(C),XQ(c)
- Q(c);OGATE::R1(C),XQ(c)
- S(b);N_GUARD::S(H)
- S(b);N_GUARD::S(H),XS(b)
- Refutation
- S(b);CHECK
- Try
- K(A);S_FLIGHT
- Vars
- S(b);CHECK,N_GUARD::S(H),XS(b)
- Q(c);N_SPINQ(c),OGATE,XR(C)::R(B),XQ(c)
- R(g);SBLOCK,XP(I)::QAR1(J)
- B(h);SBLOCK,XP(I)::QAR1(J)
- Q(c);OGATEB::R(C),XQ(c)
- Q(c);OGATE::R1(C),XQ(c)
- S(b);N_GUARD::S(H)
- Refutation
- S(b);CHECK
- Try
- S(G);XP(a)
- Threat
- QAR2(J)
- Vars
- K(f);P-FLIGHT::QAR1(J)
- R(g);SBLOCK,XP(I)::QAR1(J)
- B(h);SBLOCK,XP(I)::QAR1(J)
- Refutation
- S(b);CHECK,XS(G)
- Try
- S(G);
- Threat
- QAR2(J)
- Vars
- K(f);P-FLIGHT::QAR1(J)
- R(g);SBLOCK,XP(I)::QAR1(J)
- B(h);SBLOCK,XP(I)::QAR1(J)
- Refutation
- P(d);XS(G)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- K(f);P-FLIGHT::QAR1(J)
- R(g);SBLOCK,XP(I)::QAR1(J)
- S(b);::QAR2(J)
- Refutation
- S(b);XS(G)
- Try
- S(G);CHECK
- Vars
- K(f);P-FLIGHT::QAR1(J)
- Refutation
- P(i);XS(G)
- Try
- B(F);
- Vars
- Q(c);N_SPINQ(c),OGATE,P_PINR(B),XR(C)::R(B),XQ(c)
- R(g);SBLOCK,XP(I)::QAR1(J)
- B(h);SBLOCK,XP(I)::QAR1(J)
- S(b);N_GUARD::S(H)
- Q(c);OGATEB::R(C),XQ(c)
- Q(c);OGATE::R1(C),XQ(c)
- S(b);N_GUARD::S(H),XS(b)
- Refutation
- P(e);
- Try
- B(F);XP(i)
- Vars
- Q(c);N_SPINQ(c),OGATE,P_PINR(B),XR(C)::R(B),XQ(c)
- R(g);SBLOCK,XP(I)::QAR1(J)
- B(h);SBLOCK,XP(I)::QAR1(J)
- S(b);N_GUARD::S(H)
- Q(c);OGATEB::R(C),XQ(c)
- Q(c);OGATE::R1(C),XQ(c)
- S(b);N_GUARD::S(H),XS(b)
- Refutation
- P(e);
- Try
- R(C);
- Vars
- R(g);SBLOCK,XP(I)::QAR1(J)
- B(h);SBLOCK,XP(I)::QAR1(J)
- S(b);N_GUARD::S(H)
- Q(c);OGATE::R1(C),XQ(c)
- S(b);N_GUARD::S(H),XS(b)
- Refutation
- Q(c);N_SPINQ(c),XR(C)
- Try
- P(E);XQ(c)
- Threat
- QAR2(J)
- Vars
- R(g);SBLOCK,XP(I)::QAR1(J)
- Refutation
- P(e);P_SPINP(e),XP(E)
- Try
- Actual
- S(G);N_PINQ(c)
- Threat
- QAR2(J)
- Vars
- Q(c);CHECK,XR(B)::R(C)+S(G),XQ(c)
- Q(c);CHECK::R(C)+S(G),XQ(c)
- K(f);P-FLIGHT::QAR1(J)
- Q(c);XS(H)::R(C)+S(G)
- Q(c);OGATE,P_SPINQ(c),XS(G)::R(C),XQ(c)
- R(g);SBLOCK,XP(I)::QAR1(J)
- B(h);SBLOCK,XP(I)::QAR1(J)
- Q(c);::R(C)+S(G)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).